History of Aviation, Rare Stamps and Postal History of the World, Part 3
Lot 1106:
1936, ”Portugal”, black overprints or surcharge ”Aviao” on 2a-15a, complete set in sheet margin blocks of four, a few marginal separations, full OG (slightly dried on 5a/6a brown), NH, VF, C.v. $230 as hinged singles, Est. $100-$150, Sc. #C1-6
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